Finding the Third Proportional to 67,054.50 and 139,619.25

Step by Step Solution

1. Step 1: Write the proportion equation
   67,054.50 : 139,619.25 = 139,619.25 : x
2. Step 2: Convert to fraction form
   67,054.50/139,619.25 = 139,619.25/x
3. Step 3: Cross multiply
   67,054.50x = 139,619.25 × 139,619.25
4. Step 4: Simplify right side
   67,054.50x = 19,493,534,970.56
5. Step 5: Solve for x
   x = 19,493,534,970.56/67,054.50
6. Step 6: Final answer
   x = 290,711.81